Perform the illegal redeclaration check earlier in graph building.

test/mjsunit/regress/regress-handle-illegal-redeclaration.js

Index: test/mjsunit/regress/regress-handle-illegal-redeclaration.js
diff --git a/test/mjsunit/regress/regress-store-global-proxy.js b/test/mjsunit/regress/regress-handle-illegal-redeclaration.js
similarity index 68%
copy from test/mjsunit/regress/regress-store-global-proxy.js
copy to test/mjsunit/regress/regress-handle-illegal-redeclaration.js
index c85531c5fd917daa67b54e87141a164b90f3729b..fe04ddb27cb97e47f6c6dd893ed8812e336b0c35 100644
--- a/test/mjsunit/regress/regress-store-global-proxy.js
+++ b/test/mjsunit/regress/regress-handle-illegal-redeclaration.js
@@ -2,11 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-delete Object.prototype.__proto__;
+// Flags: --always-opt
+
+var x = 0;
 
 function f() {
-  this.toString = 1;
+  const c;
+  var c;
+  return 0 + x;
 }
 
-f.apply({});
-f();
+assertThrows(f);